Solar system

We have been learning about the solar system.We learnt the time on how long it takes for the planets to orbit the sun and then we halved and quarter the time to see what equation would be.We used multiple strategies such as Division Subtraction Algorithm Algebra Decimals and Addition.The hard part was dividing the numbers to get the right fraction. The easy part was adding up the 1/4 and 1/2 to make a 1/3.